/*
 * Copyright (C) 2005 Luca Veltri - University of Parma - Italy
 *
 * This file is part of MjSip (http://www.mjsip.org)
 *
 * MjSip is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MjSip is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MjSip; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author(s):
 * Luca Veltri (luca.veltri@unipr.it)
 */

package org.zoolu.sip.header;


import org.zoolu.sip.provider.SipParser;
import java.util.Vector;


/** SIP AuthenticationInfo header */
public class AuthenticationInfoHeader extends AuthenticationHeader
{
    /** Creates a new AuthenticationInfoHeader */
    public AuthenticationInfoHeader()
    {  super(SipHeaders.Authentication_Info,"");
    }

    /** Creates a new AuthenticationInfoHeader */
    public AuthenticationInfoHeader(String hvalue)
    {  super(SipHeaders.Authentication_Info,hvalue);
    }

    /** Creates a new AuthenticationInfoHeader */
    public AuthenticationInfoHeader(Header hd)
    {  super(hd);
    }

    /** Creates a new AuthenticationInfoHeader
     * specifing the <i>auth_scheme</i> and the vector of authentication parameters.
     * <p> <i>auth_param</i> is a vector of String of the form <i>parm_name</i> "=" <i>parm_value</i> */
    public AuthenticationInfoHeader(Vector auth_params)
    {  super(SipHeaders.Authentication_Info,"",auth_params);
    }

    /** Whether has parameter <i>param_name</i> */
    public boolean hasParameter(String param_name)
    {  char[] name_separators={'=',  ' ', '\t', '\r', '\n'};
        SipParser par=new SipParser(value);
        //par.skipString(); // skip the auth_scheme
        par.skipWSPCRLF();
        while (par.hasMore())
        {  String name=par.getWord(name_separators);
            if (name.equals(param_name)) return true;
            par.goToCommaHeaderSeparator().skipChar().skipWSPCRLF();
        }
        return false;
    }

    /** Returns the parameter <i>param_name</i>, in case removing quotes. */
    public String getParameter(String param_name)
    {  char[] name_separators={'=', ' ', '\t'};
        SipParser par=new SipParser(value);
        //par.skipString(); // skip the auth_scheme
        par.skipWSPCRLF();
        while (par.hasMore())
        {  String name=par.getWord(name_separators);
            if (name.equals(param_name))
            {  par.goTo('=').skipChar().skipWSP();
                int comma=par.indexOfCommaHeaderSeparator();
                if (comma>=0)
                    par=new SipParser(par.getString(comma-par.getPos()));
                return par.getStringUnquoted();
            }
            else par.goToCommaHeaderSeparator().skipChar().skipWSPCRLF();
        }
        return null;
    }

    /** Gets a String Vector of parameter names.
     * @return Returns a String Vector of all parameter names or null if no parameter is present. */
    public Vector getParameterNames()
    {  char[] name_separators={'=', ' ', '\t'};
        SipParser par=new SipParser(value);
        //par.skipString(); // skip the auth_scheme
        par.skipWSPCRLF();
        Vector names=new Vector();
        while (par.hasMore())
        {  String name=par.getWord(name_separators);
            names.addElement(name);
            par.goToCommaHeaderSeparator().skipChar().skipWSPCRLF();
        }
        return names;
    }

    /** Gets the athentication scheme. Note that for AuthenticationInfoHeader it always return null. */
    public String getAuthScheme()
    {  return null;
    }
}
